If f(x) = x^2 − x + 6, what is the value of f(x + h) − f(x)/h?

x + 6
x − 1
2x − 1
2x + 6
x + 5

Question

If f(x) = x^2 − x + 6, what is the value of               f(x + h) − f(x)/h?
                
x + 6
x − 1
2x − 1
2x + 6
x + 5

parthkohli · Answer

What did you try?

anonymous · Answer

i dont know this kind of stuff so i havent tried

anonymous · Answer

@ParthKohli

parthkohli · Answer

It must have been taught to you during the lessons.  I suggest you to look over them and at least try something.

anonymous · Answer

im getting ahead in school so its online

skullpatrol · Answer

what does this expression  f(x + h) − f(x)/h mean to you?

anonymous · Answer

i really dont know?

skullpatrol · Answer

$$\Huge  \frac{f(x + h) − f(x)}{h}$$

anonymous · Answer

i understand this but nothing else

skullpatrol · Answer

$$\Huge f(x) = x^2 − x + 6$$  $$\Huge f(x+h) = (x+h)^2 −( x+h ) + 6$$

skullpatrol · Answer

Does that^ make sense?

anonymous · Answer

yeah

skullpatrol · Answer

Ok, multiply it out and substitute in  f(x + h) − f(x)/h  and simply :-)

anonymous · Answer

i got 2x+6 but i dont know if its right

skullpatrol · Answer

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